标题
作者
作者:Yang, B (Yang, Bing)[1 ]; Luo, Z (Luo, Zheng)[1 ]; Yuan, B (Yuan, Bin)[1,2 ]; Liu, JW (Liu, Jiangwen)[1,2 ]; Gao, Y (Gao, Yan)[1,2 ]
期刊信息
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文献类型:Article
摘要
A bimodal porous TiNi-Ti2Ni shape memory alloy composite (SMAC) with 59% porosity was fabricated by sintering Ti-46at.%Ni elemental powders with pore-forming agent. The porous TiNi-Ti2Ni SMAC contains two irregular pores of about 400 and 120 mu m. We investigated the microstructure and pore morphology correlated with the mechanical properties and damping capacities of the SMAC. Ti2Ni intermetallic phases with size of 1-3 mu m were homogeneously distributed in the TiNi matrix. The porous TiNi-Ti2Ni SMAC exhibits exceptionally high inverse mechanical quality factor (Q (-1)) of similar to 0.25 at < 40 A degrees C, which is among the highest value reported for porous/dense shape memory alloys or composites to best of our knowledge, and it shows very high compressive fracture strain of about 25%. Moreover, the fabricated porous SMAC at relatively low strain amplitude can exhibit considerable high Q (-1) of 0.06 similar to 0.11 for a wide range of temperature between - 90 and 200 A degrees C, which is attributed to the stress concentration distribution provided by the bimodal structure of pores and the massive interfaces between pore/matrix and TiNi/Ti2Ni. These porous SMACs can be an ideal candidate for using as a lightweight damping material in the energy-saving applications.
关键词
作者关键词:composite; damping; NiTi; porous alloys; shape memory alloys
作者信息
通讯作者地址:Yuan, B (通讯作者)
 | South China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510640, Guangdong, Peoples R China. |
| Key Lab Adv Energy Storage Mat Guangdong Prov, Guangzhou 510640, Guangdong, Peoples R China. |
地址:
| [ 1 ] South China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510640, Guangdong, Peoples R China |
| [ 2 ] Key Lab Adv Energy Storage Mat Guangdong Prov, Guangzhou 510640, Guangdong, Peoples R China |
电子邮件地址:apsheng@scut.edu.cn
出版商
类别分类
研究方向:Materials Science
Web of Science 类别:Materials Science, Multidisciplinary